213728918 has 16 divisors (see below), whose sum is σ = 345885120. Its totient is φ = 98463936.

The previous prime is 213728897. The next prime is 213728951. The reversal of 213728918 is 819827312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7571 + ... + 22017.

It is an arithmetic number, because the mean of its divisors is an integer number (21617820).

Almost surely, 2^213728918 is an apocalyptic number.

213728918 is a deficient number, since it is larger than the sum of its proper divisors (132156202).

213728918 is a wasteful number, since it uses less digits than its factorization.

213728918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15031.

The product of its digits is 48384, while the sum is 41.

The square root of 213728918 is about 14619.4705102476. The cubic root of 213728918 is about 597.8897329527.

The spelling of 213728918 in words is "two hundred thirteen million, seven hundred twenty-eight thousand, nine hundred eighteen".